The Sand Sifter is used sifter sand above itself.
The Sand Sifter is created, by copying the image shown below in the TMC Crafter.
The Sand Sifter sifts blocks every 30 seconds above itself.
Sand, red sand, and soul sand can be sifted to obtain rotten flesh, leather, bones, string, gunpowder, clay balls, wheat seeds, feathers, flint, coal, sticks, quartz, gold nuggets, iron nuggets, skulls, experience bottles, diamonds, emeralds, and mage dust.
Sand can sift into any of these items.
Red Sand can sift into any of these items.
Soul Sand can sift into any of these items.